.nav-box {
  height: 1rem;
  line-height: 1rem;
  background-color: #fff;
  border-bottom: 1px solid #cccccc;
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
  box-sizing: border-box;
}
.nav-box > .nav-input {
  flex-grow: 3;
  padding: 0rem 0.2rem;
  box-sizing: border-box;
}
.nav-box > .nav-input > input[type="text"] {
  box-sizing: border-box;
  width: 100%;
  padding: 0rem 0.1rem;
  height: 0.6rem;
  border: none;
  outline: none;
  background-image: url();
  background-repeat: no-repeat;
  background-position: center;
  background-size: 0.4rem;
  background-color: #eeeeee;
  border-radius: 0.1rem;
}
.nav-box > .nav-input > input[type="text"]:focus {
  background-image: none;
  border: 1px solid #007bff;
}
.nav-box > .nav-btn {
  flex-grow: 1;
  text-align: center;
  color: #007bff;
  cursor: pointer;
  font-size: 0.36rem;
  display: none;
}
